I think an un-focused resume is more a result of the trend we have in most large companies to constantly be accepting resumes even when they aren't really hirin

I think an un-focused resume is more a result of the trend we have in most large companies to constantly be accepting resumes even when they aren't really hiring. And then of course never contacting or following up with those candidates. So there is obviously little effort put into the review process, so it makes sense that candidates don't make effort to customize their application for each potential company.